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What This Guide Helps With
Troubleshoots leak-test failures caused by circuit assembly, loose connections, damaged breathing components, accessories, sampling connections, or incorrect test setup.
Step-by-Step Troubleshooting
1. Protect the Patient and Maintain Ventilation
Do not troubleshoot a breathing-system leak while a patient depends on the affected machine. Move clinical care to another verified anesthesia and ventilation system before disconnecting or manipulating the circuit.
Expected outcome: Patient ventilation and anesthesia delivery remain uninterrupted by troubleshooting.
2. Confirm the Exact Leak-Test Failure
Repeat the applicable pre-use leak test only with the machine out of clinical use and configured correctly for testing. Record any displayed message and determine whether the failure is consistent or intermittent.
Expected outcome: The leak condition is reproducible under controlled conditions.
3. Inspect the Breathing Circuit Assembly
Trace the patient circuit from the machine outward. Check each breathing hose, Y-piece, connector, elbow, adapter, reservoir component, and other removable circuit component for disconnection, looseness, cracks, splits, deformation, or improper assembly.
Expected outcome: The breathing circuit is intact and all connections are secure. If correcting a loose or damaged circuit component allows the leak test to pass, stop troubleshooting after final verification.
4. Inspect the Patient Interface and Test Closure
Verify that the circuit is terminated or occluded exactly as required for the applicable test setup. Check that any test plug, bag, or interface used during the test is correctly positioned and sealed.
Expected outcome: The test setup provides the intended closed breathing system.
5. Check Sampling and Accessory Connections
Inspect accessible gas-sampling lines, adapters, filters, water traps, monitoring connections, and other circuit accessories for open ports, loose fittings, cracks, or incorrect installation.
Expected outcome: No accessory or sampling connection creates an unintended leak.
6. Inspect Accessible Breathing-System Components
Check externally accessible breathing-system components that are intended to be removable by trained personnel. Verify correct seating, locking, orientation, and physical condition. Do not disassemble internal pneumatic assemblies.
Expected outcome: Accessible breathing-system components are correctly installed and seated.
7. Use a Known-Good Circuit or Accessory When Appropriate
If the leak remains and an approved known-good equivalent is available, substitute the patient circuit or suspected removable accessory one component group at a time.
Expected outcome: If the leak test passes with a known-good component, the external defective component has been isolated and can be replaced.
8. Repeat the Leak Test and Complete Functional Verification
Reassemble the system using approved components and repeat the required leak and pre-use checks. Verify ventilation, pressure behavior, alarms, and gas-delivery functions appropriate to return to service.
Expected outcome: The leak test passes consistently and the machine completes required functional verification.
If the Problem Persists
If circuit tubing, connectors, test setup, sampling lines, filters, removable accessories, and accessible breathing-system components have been verified and the leak test still fails, an internal pneumatic, valve, seal, sensor, or other service-level problem may be present.
Remove the Getinge Flow-c from service, label it Out of Service, and send it for repair or bench evaluation. Further troubleshooting should follow appropriate manufacturer documentation and use approved pressure, flow, and anesthesia-system test equipment. Internal pneumatic disassembly should be performed only by qualified personnel.
The machine must successfully complete required leak, ventilation, alarm, and functional checks before return to service. Knowing when external leak isolation has reached its limit is proper troubleshooting.
Clinical Use Tip
A breathing-system leak can affect both ventilation and anesthetic delivery; use another verified machine until the complete breathing system passes its required checks.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"OR staff reported the Getinge Flow-c repeatedly failed its patient-circuit leak test during room setup."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found a cracked breathing-circuit hose creating an external leak."
Resolution
What action was taken.
Example:
"Clinical Engineering replaced the damaged circuit with an approved component, repeated the leak test successfully, and verified normal ventilation and alarm operation."
Helpful Details to Include (If Known)
- Exact leak-test message
- Circuit configuration during failure
- Hose and connector condition
- Sampling-line and filter condition
- Open or unused ports identified
- Known-good circuit substitution result
- Whether failure was consistent or intermittent
- Leak-test result after correction
- Final functional-test result
- Final device status
Final Thought
Leak failures should be approached from the patient circuit inward: verify assembly, connections, accessories, and test setup before suspecting the machine itself. Escalate persistent leaks and document both the identified cause and successful final verification.
That is successful troubleshooting.